CN1473895A - Nano carbon anti-sorrosive conductive paint used for power system earthing net - Google Patents

Nano carbon anti-sorrosive conductive paint used for power system earthing net Download PDF

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CN1473895A
CN1473895A CNA031252370A CN03125237A CN1473895A CN 1473895 A CN1473895 A CN 1473895A CN A031252370 A CNA031252370 A CN A031252370A CN 03125237 A CN03125237 A CN 03125237A CN 1473895 A CN1473895 A CN 1473895A
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ammonium chloride
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邵建人
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TWENTY-ONE CENTURY ANTI-CORROSION SCIENCE AND TECHNOLOGY Co Ltd WUHAN
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Abstract

The present invention relates to anticorrosive conductive paint. The nano carbon anticorrosive conductive paint for power system earthing net is prepared with nano carbon 10-55 wt%, epoxy urushiol resin 10-55 wt% and organic solvent 10-50 wt%, with the organic solvent being the mixture of isometric xylene and ethyl acetate. The present invention has good anticorrosive and conductive performance.

Description

The nano-carbon anticorrosion conductive coating that power system ground net is used
Technical field
The present invention relates to a kind of corrosion-resistant conductive coating, the corrosion-resistant conductive coating that particularly power system ground net is used.
Background technology
Be the important leverage of generating, power transformation and power transmission system safe operation power ground.It is problem very active in the International Power academic research that the corrosion and protection technology of power transformation system works ground connection is sent in interchange.Along with the increase of China's power capacity and the rising of voltage range, the domestic generation repeatedly caused great electric operational accident because of the power system working grounding is corroded in recent years.Exchange ground net corrosion, burn and rebuild, its financial loss is huge; And indirect economic loss long-time and that large-area power-cuts causes can't calculate especially.
The earth mat corrosion-resistant conductive coating antiseptic property that make of graphite certain scientific research institution is relatively poor, because: one, graphite has laminate structure, and the stress that produces behind the drying varniss shrinks is enough to make the graphite layers cracking, causes the ionogen invasion, serious threat earth mat safety; Its two, have tangible interface greater than 1 micron conductive filler material and polymeric adhesion material, the closed performance of coating is poor, antiseptic property is also poor.
The earth mat corrosion-resistant conductive coating antiseptic property that certain enterprise makes of 200 order nickel powders is relatively poor, be that conductive filler material and polymeric adhesion material have tangible interface equally, the closed performance of coating is poor, and antiseptic property is also poor, if nickel powder is too thin, its surface is because of oxidation conductivity variation.
Graphite is the material of carbon by SP2 hybridized orbital formation, has laminate structure and electroconductibility.The electrically conducting coating made from graphite conducts electricity very well, but antiseptic property is unsatisfactory.The laminate structure of graphite has determined that the coating closed performance is poor.The string stress that this coating produces in the dry solidification process makes the graphite layers cracking, and electrolyte solution is just taken advantage of a weak point.Because the electropotential of carbon is than iron height, in the corrosion galvanic cell of conductive coating and earth mat carbon steel formation, carbon steel has been accelerated the earth mat corrosion as sacrificial anode.The carbon steel print that scribbles graphite conducting coating material is made immersion test in concentration is 10% salt solution, promptly had pitting attack to produce in 15 days, has rusty stains in 3 months, and beaker bottom also can be observed one deck iron rust.
The basic reason that nickel powder electrically conducting coating antiseptic property is bad, exactly because of the nickel powder that can only use about 200 orders, and nickel powder is too thin, and the nickel powder surface is promptly oxidized.Mix with organic polymer material with the nickel powder about this 200 orders, its interface is clearly demarcated, has no reinforcement, and closed performance is very poor.
Summary of the invention
At above-mentioned deficiency, the nano-carbon anticorrosion conductive coating that the object of the present invention is to provide a kind of anticorrosion power system ground net that conducts electricity very well to use.
To achieve these goals, technical scheme of the present invention is: the nano-carbon anticorrosion conductive coating that power system ground net is used, it is characterized in that it is made up of nano-sized carbon, epoxy-based lacquers phenol resins, organic solvent, the shared total weight percent of each component is: nano-sized carbon 10-55, epoxy-based lacquers phenol resins 10-55, organic solvent 10-50, wherein organic solvent is that dimethylbenzene and ethyl acetate mixed by 1: 1.
The shared gross weight optimized percentage of aforesaid each component is: nano-sized carbon 35, epoxy-based lacquers phenol resins 35, organic solvent 30.
Described nano-sized carbon is made up of commercially available conductive carbon black, tensio-active agent alkyl trimethyl ammonium chloride or tensio-active agent alkyl dimethyl benzyl ammonium chloride, trolamine, and the shared total weight percent of each component is: commercially available conductive carbon black 97-99, tensio-active agent alkyl trimethyl ammonium chloride or tensio-active agent alkyl dimethyl benzyl ammonium chloride 0.8-2.4, trolamine 0.2-0.6.
The shared gross weight optimized percentage of aforesaid nano-sized carbon each component is: commercially available conductive carbon black 98, tensio-active agent alkyl trimethyl ammonium chloride or tensio-active agent alkyl dimethyl benzyl ammonium chloride 1.6, trolamine 0.4.
Aforesaid alkyl trimethyl ammonium chloride is: octadecyl trimethyl ammonium chloride, Dodecyl trimethyl ammonium chloride, palmityl trimethyl ammonium chloride etc.
Aforesaid alkyl dimethyl benzyl ammonium chloride is: stearyl dimethyl benzyl ammonium chloride, dodecyl benzyl dimethyl ammonium chloride, tetradecyl dimethyl benzyl ammonium chloride etc.
The present invention adopts above-mentioned prescription, and nano-sized carbon and organic polymer interpenetrate with the particle diameter of the same order of magnitude almost, do not have tangible interface.This moment, nano-sized carbon not only possessed reinforcing function and closing function, and antiseptic property is fine, can also improve the conductivity of coating greatly.Because adopt nanotechnology, coating reinforcing property, closed performance and conductivity are better, this coating can not ftracture in the dry solidification process, and electrolyte solution can't be penetrated into coating inside, thereby the present invention is anticorrosion, conductivity is fine.
Since nano-carbon anticorrosion conductive coating is a kind of colloidal dispersion, it must have thermodynamic (al) stability and dynamic (dynamical) unstable so.Because the effect of tensio-active agent alkyl trimethyl ammonium chloride or tensio-active agent alkyl dimethyl benzyl ammonium chloride, the coating after the layering stirs a little, and nano-sized carbon is homodisperse again, does not influence the execution of coating performance.Add epoxy-based lacquers phenol resins (being modification state lacquer), antiseptic property is splendid, and human body is not had anaphylaxis, and fast drying.Organic solvent can be regulated dope viscosity, is convenient to construction.
Description of drawings
Fig. 1 is preparation technology's schema of the present invention.
Embodiment
The nano-carbon anticorrosion conductive coating that power system ground net is used, it is made up of nano-sized carbon, epoxy-based lacquers phenol resins, organic solvent, the shared total weight percent of each component is: nano-sized carbon 10-55, epoxy-based lacquers phenol resins 10-55, organic solvent 10-50, wherein organic solvent is that dimethylbenzene and ethyl acetate mixed by 1: 1.
Figure A0312523700041
Described nano-sized carbon is made up of commercially available conductive carbon black, tensio-active agent alkyl trimethyl ammonium chloride or tensio-active agent alkyl dimethyl benzyl ammonium chloride, trolamine, and the shared total weight percent of each component is: commercially available conductive carbon black 97-99, tensio-active agent alkyl trimethyl ammonium chloride or tensio-active agent alkyl dimethyl benzyl ammonium chloride 0.8-2.4, trolamine 0.2-0.6.
The nano-sized carbon example:
Figure A0312523700051
Aforesaid alkyl trimethyl ammonium chloride is: octadecyl trimethyl ammonium chloride, Dodecyl trimethyl ammonium chloride, palmityl trimethyl ammonium chloride.
Aforesaid alkyl dimethyl benzyl ammonium chloride is: stearyl dimethyl benzyl ammonium chloride, dodecyl benzyl dimethyl ammonium chloride, tetradecyl dimethyl benzyl ammonium chloride.1, the preparation method of preparation method's 1.1 nano-sized carbon of the present invention
According to bibliographical information, the preparation method of nano-sized carbon has several different methods such as vapor phase process, comminution by gas stream and liquid phase staging.Vapor phase process is to utilize hydro carbons gaseous substance generation reduction reaction and obtain nano-sized carbon, can disposablely obtain purity height and the rational goods of size distribution, and its shortcoming is that nano-sized carbon generation secondary is assembled and formed a micron carbon dust.This secondary aggregate is used for reinforcing rubber, under the effect of the powerful shearing force of mixing roll, will be dispersed into nanometer carbon black again, thereby reinforcing property is splendid.If this secondary aggregate carbon black is used for the stopping composition of coating, then can't destroy the secondary structure of carbon black.Though comminution by gas stream can prepare nano-carbon powder a large amount of, that size distribution is wide, its apparatus expensive and bigger to the Working environment pollution.
The liquid phase staging method a kind of economy, that can produce conductive nano carbon in batches of can yet be regarded as, proper as long as processing condition are selected, can make size distribution rationally and lower-cost goods.The commodity conductive carbon black can obtain fineness carbon dust distributed more widely behind ball milling, they are mixtures of nano-carbon powder and micron carbon dust.Distribute rationally and the higher nano-sized carbon organosol of purity through adopting the electrostatic field grading technology can obtain fineness.
The static wet classification technology of ultrafine particle, in the research of industrially developed country such as Japan and the United States early, it is to utilize electrical forces that the different charged particle of particle diameter is had different magnetisms or repulsive force, realizes in electrostatic field.
According to the settling velocity formula of solid in liquid: V = 2 r 2 ( ρ - ρ 0 ) g η 9 . . . . . . ( 1 ) As solid density ρ, fluid density ρ 0, when kinetic viscosity η and gravity acceleration g are constant, formula (1) can be expressed as:
v 1/ v 2=r 1 2/ r 2 2=d 1 2/ d 2 2(2) d is the diameter of particle in the formula (2).
By formula (2) as can be known, the settling velocity of micron particle ratio nano particle in gravity field is faster.On the other hand, to make the speed of horizontal motion than micron particle in electrostatic field again faster for nanoparticle.As long as the strength of electric field of controlling well just can be separated nanoparticle and micron particle.Is the key of problem is: how the carbon dust behind ball milling with electric charge? we are in the ball-milling technology process, used tensio-active agent alkyl trimethyl ammonium chloride or tensio-active agent alkyl dimethyl benzyl ammonium chloride with the black carbon surface modification, carbon black after the modification is polarized in electrostatic field, and under the effect of electrical forces, positively charged ultra-fine carbon black generation electrophoresis and shift to negative pole.Particle diameter is more little, and degree of polarization is big more, and its electrophoretic velocity is also just fast more, thereby reaches the purpose of classification.1.2 nano-carbon anticorrosion conductive coating preparation technology flow process:
Adopt technical process that the liquid phase staging prepares nano-carbon anticorrosion conductive coating as shown in Figure 1.2, the antiseptic property of nano-carbon anticorrosion conductive coating is studied 2.1 experimental techniques
With sand paper the tin coating on 20 120mm * 25mm tinplate is polished off, use nano-carbon anticorrosion conductive coating dip-coating twice again, be divided into 10 groups after doing solid work and in 10% NaCl, 10%NaOH solution, soak the print that scribbles corrosion-resistant conductive coating respectively.2.2 experiment conclusion
After the 720h immersion, observe the coatingsurface of all prints, none takes place to bubble and corrosion spot.2.3 nano-sized carbon electrically conducting coating and graphite conducting coating material antiseptic property simultaneous test
Experimental technique is identical with 2.1, after soaking through 720h, observes the print surface that scribbles graphite conducting coating material, find that all print surfaces bubble in a large number and be covered with the corrosion spot, and beaker bottom has a large amount of brown throw outs; Observation scribbles the print surface of nano-sized carbon electrically conducting coating, finds that all print surfaces are excellent, none foaming, none corrosion spot.2.4 nano-sized carbon electrically conducting coating and nickel powder electrically conducting coating antiseptic property simultaneous test
Experimental technique is identical with 2.1, after soaking through 720h, observes the print surface that scribbles the nickel powder electrically conducting coating, finds to have a large amount of corrosion spots; Observation scribbles the print surface of nano-sized carbon electrically conducting coating, finds that all print surfaces are excellent, none foaming, none corrosion spot.2.5 experimental result discussion
Nano-sized carbon except conducting function, also possesses reinforcement and closing function as the functional stuffing of coating.When the particle diameter of filler>1 μ m, only a kind of physical mixed of machinery between filler and the organic polymer, its interface is clearly demarcated, does not possess reinforcement and closing function; When the particle diameter of filler<100nm, its specific surface area is very big, and surface energy is also very big, possesses the general character of nano material, and this filler and organic polymer material have not been a kind of simple and mechanical physical mixed.Nano-sized carbon and organic polymer interpenetrate with the particle diameter of the same order of magnitude almost, do not have tangible interface.This moment, nano-sized carbon not only possessed reinforcing function and closing function, can also improve the conductivity of coating greatly.Because adopt nanotechnology, coating reinforcing property, closed performance and conductivity are better, this coating can not ftracture in the dry solidification process, and electrolyte solution can't be penetrated into coating inside, thereby the anticorrosion conductivity of the present invention is fine.

Claims (6)

1. the nano-carbon anticorrosion conductive coating that power system ground net is used, it is characterized in that: it is made up of nano-sized carbon, epoxy-based lacquers phenol resins, organic solvent, the shared total weight percent of each component is: nano-sized carbon 10-55, epoxy-based lacquers phenol resins 10-55, organic solvent 10-50, wherein organic solvent is that dimethylbenzene and ethyl acetate mix by 1.1.
2. the nano-carbon anticorrosion conductive coating that power system ground net according to claim 1 is used is characterized in that: the shared gross weight optimized percentage of described each component is: nano-sized carbon 35, epoxy-based lacquers phenol resins 35, organic solvent 30.
3. the nano-carbon anticorrosion conductive coating that power system ground net according to claim 1 and 2 is used, it is characterized in that: described nano-sized carbon is made up of commercially available conductive carbon black, tensio-active agent alkyl trimethyl ammonium chloride or tensio-active agent alkyl dimethyl benzyl ammonium chloride, trolamine, and the shared total weight percent of each component is: commercially available conductive carbon black 97-99, tensio-active agent alkyl trimethyl ammonium chloride or tensio-active agent alkyl dimethyl benzyl ammonium chloride 0.8-2.4, trolamine 0.2-0.6.
4. the nano-carbon anticorrosion conductive coating that power system ground net according to claim 3 is used is characterized in that: the shared gross weight optimized percentage of described nano-sized carbon each component is: commercially available conductive carbon black 98, tensio-active agent alkyl trimethyl ammonium chloride or tensio-active agent alkyl dimethyl benzyl ammonium chloride 1.6, trolamine 0.4.
5. the nano-carbon anticorrosion conductive coating of using according to claim 3 or 4 described power system ground nets, it is characterized in that: described alkyl trimethyl ammonium chloride is: octadecyl trimethyl ammonium chloride, Dodecyl trimethyl ammonium chloride, palmityl trimethyl ammonium chloride.
6. the nano-carbon anticorrosion conductive coating of using according to claim 3 or 4 described power system ground nets, it is characterized in that: described alkyl dimethyl benzyl ammonium chloride is: stearyl dimethyl benzyl ammonium chloride, dodecyl benzyl dimethyl ammonium chloride, tetradecyl dimethyl benzyl ammonium chloride.
CN 03125237 2003-08-07 2003-08-07 Nano carbon anti-sorrosive conductive paint used for power system earthing net Expired - Fee Related CN1209424C (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1317345C (en) * 2005-07-05 2007-05-23 国家***天津海水淡化与综合利用研究所 Internal wall anticorrosive coating for sea water evaporating installation
CN101892003A (en) * 2010-07-06 2010-11-24 国网电力科学研究院武汉南瑞有限责任公司 Nano conductive anti-corrosive paint for earth screen
CN102420358A (en) * 2011-11-14 2012-04-18 江苏金合益复合新材料有限公司 Earthing electrode with nanometer material anti-corrosive conducting layer and manufacturing method thereof
CN102723620A (en) * 2012-06-20 2012-10-10 青岛辉安工程控制有限公司 Composite anticorrosion grounding device and preparation method thereof
CN103956591A (en) * 2014-03-25 2014-07-30 苏州雷仕达电子科技有限公司 Star-shaped ground body of nanometer conductive anticorrosion coating
CN105118562A (en) * 2015-07-09 2015-12-02 国家电网公司 Anticorrosion bus and manufacturing method thereof
CN107325686A (en) * 2017-08-07 2017-11-07 百氏高涂料(苏州)有限公司 Binary polymerization graphene nano anticorrosive paint and technology of preparing
CN108250958A (en) * 2018-01-30 2018-07-06 浙江人通电力科技有限公司 A kind of preparation method of composite anti-corrosive conductive coating
CN108250817A (en) * 2018-01-30 2018-07-06 浙江人通电力科技有限公司 A kind of electrical engineering composite anti-corrosive conductive earthing material
CN108384294A (en) * 2018-01-30 2018-08-10 浙江人通电力科技有限公司 A kind of composite anti-corrosive conductive coating
CN114958145A (en) * 2022-06-14 2022-08-30 湖北省林业科学研究院 Composite coating and application thereof

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1317345C (en) * 2005-07-05 2007-05-23 国家***天津海水淡化与综合利用研究所 Internal wall anticorrosive coating for sea water evaporating installation
CN101892003A (en) * 2010-07-06 2010-11-24 国网电力科学研究院武汉南瑞有限责任公司 Nano conductive anti-corrosive paint for earth screen
CN102420358A (en) * 2011-11-14 2012-04-18 江苏金合益复合新材料有限公司 Earthing electrode with nanometer material anti-corrosive conducting layer and manufacturing method thereof
CN102723620A (en) * 2012-06-20 2012-10-10 青岛辉安工程控制有限公司 Composite anticorrosion grounding device and preparation method thereof
CN102723620B (en) * 2012-06-20 2015-03-25 青岛辉安工程控制有限公司 Composite anticorrosion grounding device and preparation method thereof
CN103956591A (en) * 2014-03-25 2014-07-30 苏州雷仕达电子科技有限公司 Star-shaped ground body of nanometer conductive anticorrosion coating
CN105118562A (en) * 2015-07-09 2015-12-02 国家电网公司 Anticorrosion bus and manufacturing method thereof
CN107325686A (en) * 2017-08-07 2017-11-07 百氏高涂料(苏州)有限公司 Binary polymerization graphene nano anticorrosive paint and technology of preparing
CN108250958A (en) * 2018-01-30 2018-07-06 浙江人通电力科技有限公司 A kind of preparation method of composite anti-corrosive conductive coating
CN108250817A (en) * 2018-01-30 2018-07-06 浙江人通电力科技有限公司 A kind of electrical engineering composite anti-corrosive conductive earthing material
CN108384294A (en) * 2018-01-30 2018-08-10 浙江人通电力科技有限公司 A kind of composite anti-corrosive conductive coating
CN114958145A (en) * 2022-06-14 2022-08-30 湖北省林业科学研究院 Composite coating and application thereof

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